Home / 20,420.40-28,181.52-12,466.92

Finding the Fourth Proportional to 20,420.40, 28,181.52 and 12,466.92

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Solution

The fourth proportional to 20,420.40, 28,181.52 and 12,466.92 is: 17,205.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.40 : 28,181.52 = 12,466.92 : x
  2. Step 2: Convert to fraction form
    20,420.40/28,181.52 = 12,466.92/x
  3. Step 3: Cross multiply
    20,420.40x = 28,181.52 × 12,466.92
  4. Step 4: Simplify right side
    20,420.40x = 351,336,755.32
  5. Step 5: Solve for x
    x = 351,336,755.32/20,420.40
  6. Step 6: Final answer
    x = 17,205.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.